Ok i have been fighting this problem for over two weeks now and no luck. Its the slime brown algea and on the LR and the bottom. Im using RO/Di water so im really not sure where its comming from. Would alot of small water changes take care of this or not?

You can siphon it out to remove it. Then increase water flow to theses areas tp keep it from taking hold again. It will still likely return until you find the source of excess nutrients that are feeding the algaes.